Help:Assembly standard 21

Researchers at UC Berkeley have developed the BglBrick assembly standard, or Assembly standard 21, based on idempotent assembly with BamHI and BglII restriction enzymes. In a nutshell, most parts look like this:

Note, however, that Assembly standard 20 is intended as a minimal physical assembly standard, and only those features needed for interconversion of BglBrick assembly standard plasmids are formally defined. Therefore, atg and taa spacers are not core definitions of the standard.